a Represents all adults and children age 5 and older. Data are
for passenger vehicles, which include cars, light trucks, vans, pickups, and
utility vehicles. Excludes medium and heavy trucks.

b In 2002, the National Highway Traffic Safety Administration
(NHTSA) revised its method for estimating lives saved by safety belts. The
previous method included survey data from states with and without belt use
laws. The current method relies on police-reported restraint use information
for each individual occupant fatality. Also, the estimate now includes lives
saved in passenger vehicles at all seating positions, where previously it had
been front outboard positions only.

c In 2002, the National Highway Traffic Safety Administration
revised the method for calculating lives saved by air bags.